#ifndef _CHAR_TYPE_H
#define _CHAR_TYPE_H

#include <types.h>

int32_t ischar(int32_t c);
int32_t isspace(char c);
int32_t isalpha(char c);
int isprint(int c);
char upper(char c);
char toupper(char c);
char lower(char c);
char toupper(char c);
char lower(char c);

#endif